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                [Cerc2015]Looping Labyrinth                </h1>
                <p>时间限制：20s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：512MB</p>			</div>
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                                <h3>题目描述</h3><p><p>一座迷宫是由一个矩形网格铺上一种图案得到的。矩形网格有n行m列，每一个格子不是空的就是被覆盖的。如此就形成了一个无穷大的网格，且图案向四个方向无限循环。<br />
&nbsp;&nbsp;&nbsp; 我们给每个格子编号(包括负整数),行数向下递增，列数向右递增，座标为(0,0)的单元格为原点。整个迷宫由复制图案到每个n&times;m的矩阵而成(没有旋转和镜像操作)。每个图案的左上角的单元格的行数可被n整除，列数可被m整除。原图案的左上角位于原点，右下角的座标为(n-1,m-1)。<br />
&nbsp;&nbsp;&nbsp; 我们需从一个单元格出发，向上、下、左、右移动，经过一些空格，到达原点。<br />
&nbsp;&nbsp;&nbsp; 你将被给出一个图案和一些出发点。确定从这些出发点出发是否能逃出迷宫。</p></p><hr/><h3>输入格式</h3><p><p>第一行包括2个整数n和m(1&lt;=n,m&lt;=100)&mdash;&mdash;图案的行数和列数。<br />
接下来n行每行包括一个长度为m的字符串，表示图案的一行。&ldquo;#&rdquo;表示一个被覆盖的单元格，&ldquo;.&rdquo;表示未被覆盖的单元格。<br />
接下来一行包括一个整数q&mdash;&mdash;出发点的个数。<br />
接下来q行，每行包括两个整数r和c(-109&lt;=r,c,&lt;=109)&mdash;&mdash;出发点的座标。<br />
原点和所有出发点都是空单元格。</p></p><hr/><h3>输出格式</h3><p><p>输出包括q行。<br />
对每个出发点，如果能过逃出迷宫，输出&ldquo;yes&rdquo;,否则输出&ldquo;no&rdquo;。</p></p><hr/><h3>样例输入</h3><pre>6 9
．．＃＃＃＃＃．．
．．＃．．．＃．． 
．．．．．．＃．． 
．．＃＃＃＃＃．． 
．．＃．．．．．． 
．．＃．．．＃．． 
5
1 4
5 4
1 -5
5 -5
-1000000000 0</pre><hr/><h3>样例输出</h3><pre>yes
no
no
yes
yes
</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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